Chroma/chroma/inc/kernel/system/memory.h
Curle d522d40ac8 Attempts at fixing paging.
Have somehow fixed the drawing routines along the way.

I also tried to implement a better keyboard handler, but that's quite a ways away right now.
2020-04-11 23:02:54 +01:00

47 lines
1.2 KiB
C

#include <stddef.h>
#include <stdint.h>
#include <kernel/system/interrupts.h>
#define PAGE_SIZE 4096
#define PAGES_PER_BUCKET 8
#define OFFSET_BIT(i) Memory[i / PAGES_PER_BUCKET]
#define SET_BIT(i) OFFSET_BIT(i) = OFFSET_BIT(i) | (1 << (i % PAGES_PER_BUCKET))
#define UNSET_BIT(i) OFFSET_BIT(i) = OFFSET_BIT(i) & (~(1 << (i % PAGES_PER_BUCKET)))
#define READ_BIT(i) ((OFFSET_BIT(i) >> (i % PAGES_PER_BUCKET)) & 0x1)
#define GET_BUCKET32(i) (*((uint32_t*) (&Memory[i / 32])))
#define IS_ALIGNED(addr) (((size_t) addr | 0xFFFFFFFFFFFFF000) == 0)
#define PAGE_ALIGN(addr) ((((size_t) addr) & 0xFFFFFFFFFFFFF000) + 0x1000)
#define SET_PGBIT(cr0) (cr0 = cr0 | 1 << 31)
#define UNSET_PGBIT(cr0) (cr0 = cr0 ^ 1 << 31)
#define UNSET_PSEBIT(cr4) (cr4 = cr4 & 0xFFFFFFEF)
#define TOGGLE_PGEBIT(cr4) (cr4 = cr4 ^ (1 << 7))
#define SET_PAEBIT(cr4) (cr4 = cr4 | 1 << 5)
#define ERR_PRESENT 0x1
#define ERR_RW 0x2
#define ERR_USER 0x4
#define ERR_RESERVED 0x8
#define ERR_INST 0x10
extern size_t end;
void ListMemoryMap();
void InitMemoryManager();
size_t AllocateFrame();
void FreeFrame(size_t FrameNumber);
size_t SeekFrame();
void MemoryTest();
void InitPaging();
void PageFaultHandler(INTERRUPT_FRAME frame);